How to synchronize time in Tiny Core Linux?

[Adam]

My VirtualBox setup is as follows.
3 core linux configured with static routing.
Virtualbox network configured as host only, meaning no internet access.



When I troubleshoot routing issues with tcpdump, I’ve found that time are not synchronize between these 3 boxes.

[SOLVED] Tiny Core Linux Routing Issue
http://forum.tinycorelinux.net/index.php/topic,15757.0.html

I’ve found that time synchronization can be done in Virtual Box by installing guest addition.
http://www.virtualbox.org/manual/ch09.html#idp15295440

Unfortunately, I’m still having a problem to install guest addition as discussed here.
How to install VirtualBox Guest Additions in Tiny Core Linux?
http://forum.tinycorelinux.net/index.php/topic,15772.0.html

I would appreciate if you could suggest any solution for this. Thanks in advance.