This is what I did and I hope someone can tell me what I did wrong.
1. I downloaded CorePlus-current.iso
2. In
http://tinycorelinux.net/faq.html#pendrives , it says,
Note using other third party installation tools, such as, unetbootin is not and cannnot be automatic. Obviously unetbootin does not "know" about our distribution, i.e., not listed in the drop choices. Therefore using unetbootin simply copies the entire iso to target.
On a cdrom we cannot have a tce dir. It would be READ_ONLY and nothing would work insofar as adding extensions. That is why there is a cde directory in the iso! It is also a fact that one cannot have two tce directores in the same partition. Nothing new about that,
It should be obvious that one can use the TinyCore CD or the CorePlus CD READ_ONLY devices to process and access any tce directory on a writable store, i.e., works as expected.
Therefore if one insists on using a third party installation tool and one that does not officially support Core and thereby copies the entirety of the TinyCore iso then you are faced with manual setup of either creating a second partition for your tce dir, or renaming the cde to tce thus indicating that this is not a CD and editing the syslinux.cfg changing cde to waitusb=5 to indicate that is a pendrive.
I used unetbootin to install CorePlus-current.iso to my USB thumb drive, and the additional steps are exactly what I did (renamed cde to tce, and edited syslinux.cfg by changing ALL cde to waitusb=5) .
3. That's all I did with my USB thumb drive, and I was able to successfully boot into it by rebooting and going to BIOS and making the thumb drive boot first.
4. On the CorePlus desktop screen, I clicked the TC_Install icon.
5. Click Path to core.gz textbox
Choose the file /mnt/sdb1/boot/core.gz (sdb1 is my thumb drive that contains CorePlus which I was able to boot into, correct?)
6. Frugal is checked.
7. Check the Existing Partition option.
8. Select the sda6 which is my Lubuntu partition. Unchecked Install boot loader. Click the next button (right arrow button).
I did this because of this advice:
Note: If you already have a Linux System booting, then you do not need to make a partition for Tiny Core! Tiny Core can run in a single directory in your existing Linux installation. To do so, at step 1, uncheck the option to "Install boot loader". At step 2, select an existing partition, and at Step 3, do not format it. Upon completion you will need to manually configure your existing boot loader.
9. Select No formatting, use existing. Click next button.
10. In the Boot Options Reference List, I just clicked next button.
11. Select Core Only (Text Based Interface). Check all Extensions Categories to Install. Click next button.
12. Click Proceed.
13. I got an error:
UUID="04d5f1f0-ae2d-4b50-aced-8a39da76dbb8"
Error mounting usb device
Thank you for your time. Excuse my ignorance, I'm not an expert.
By the way, my initial intention was just to have a 64-bit command-line-only Core version on my hard drive, and be able to boot it and then to build it by installing a window manager, etc. There seems to be no clear steps on how to do it, or maybe I'm just confused, or not experienced enough. I think the steps stated above would install a 32-bit version only? I don't understand why I find it so difficult to install (Micro)Core 64-bit. I've been installing Linux distros for a couple of years now (lubunut and linuxmint) but this is the first time I've encountered some difficulty. I want 64-bit command line only version in my hard drive that I can boot into, and it would be installed along my Windows 7 and antiX, making it a triple boot system. I'm getting frustrated sorry.