Ok - so I saved the whole thing on floppy and transferred to the other cpu. I took all the steps it said in the readme file and the thing did override my former EU files, as expected. But then there was a problem.
Now, before I illustrate it, in the patch it said that the latest version (in that case EU 1.09, I think) was needed. I wasn't sure I had it, but I installed it anyway and it seemed to work. Could it be that whatever problem I'm having now is dependent on the fact that I only had the original, normal EU?
Anyway, here's my problem: I can open and play all right the IGC campaign, but I can not set the parameters for the non-playing countries. Apparently I have to open the patch.exe program (done) and then the IGCConfig one, but in both cases they close immediately after I open them. I only managed to catch a glimpse, once, of something that said "Error in the parameter", or something of the sort.
So conclusions: I can play the IGC campaign, but I can not open the IGCConfig before I open EU, so I can not set other countries as annexable.
Any help would be VERY appreciated. Thanks.
And since I'm at it, I saw in the options section (while trying to see if I could set the countries as non-playing from within the game) an option saying something like "Forced Annexations": ON or OFF. (and it was set at ON). Now, what the heck does THAT mean?