Okay...

When loading into a online arena before this reinstall it showed a counter, going through all the skins (yes I have all of them) loading them into memory. I did have the high-res pack installed previously too. Thought the RAM was enough to load it, as it showed a lot of mem usage in sys info (ctrl + i). Perhaps it was loaded in a page file on the hdd? Now it only loads the environment skins and apparently skip all a/c skins while the 'preload skins' option is greyed out in graphics settings menu. The system memory usage is displayed as 0 (!) no mem usage at all, while video memory is something redicilous like 16MB or something like that. Will have to check later for exact numbers. Vid memory however display a correct 2 GB.
Is there any way I can enable skin preloading again?
BTW, skins folder show slightly more than 300 MB on the hdd, how much mem is required to load all textures? I have 4GB, that should be enough no?