Ok, I am satisfied with my own testing and have uploaded a new cut to each of the dCore x86 ports in their release candidate section. Lots of changes, I will try to summarize them here. The command you use is updatesce. Importupdatecheck has been removed as an extension and the old extension can't be installed alongside the new changes or it will cause problems. Below are the command options.
updatesce - Will open up a select menu of existing SCEs to choose from. You can choose one, several, or up to all.
updatesce -c - will do as above but is in the "check only" mode and will not update the SCE but let you know if updates are available. Can be combined with the other options.
updatesce -a - will update all existing SCEs. Can be combined with the other options, combining with -c will just check all of them and -n will prevent having to answer any questions.
updatesce -n - Non-interactive mode. Only if you don't enter either an SCE name or the "-a" option will a select menu appear. Can be combined with the other options. Spits out the results to /tmp/updateavailable rather than asking you do you want to view that file.
As with importsce, installing GNU grep beforehand very much enhances performance.
Also, importsce has 2 new options.
importsce -u - that will fetch a new debinx for the main Debian one and any in /opt/debextra. This is the default and will trump the "-p" option whether it is listed in /etc/sysconfig/sceconfig or the command line. UPDATEDEBINXMODE=TRUE is the entry in /etc/sysconfig/sceconfig.
importsce -p - that will use the existing debinx files, useful if you are importing several packages overa short time and don't need to sync new debinx files. This option is overridden by either an entry in /etc/sysconfig/sceconfig or the command line option of "-u". The relevant entry in /etc/sysconfig/sceconfig is PRESERVEDEBINXMODE=TRUE.