Holmie , one more suggestion. Install a new copy of c2k5 , and then see the basic size of the fsh files. Coz when i installed your patch i found that the earlier WC 2003 patch i was using , the fsh was about 23 k's and yours was 500 + !!!!!!
also , see if your are enlarging the resolution in the basic ratio . Thats too important . Coz for example , say the basic size was 1*2 , you have to make it in multiples of this. Like 2*4 , 3*6 etc. You cannot exceed the ratio. This may be crashing the game.