Fixing payware scenery? - Aerosoft EHAM Amsterdam

Hi,About 5 months ago I (and many others) bought the new FS2004 Aerosoft's EHAM scenery.Like all new software it contained bugs which is no problem, if they just get fixed after a while.However it took the developer 4 months to release a patch, and (among others) one of the most annoying bugs still hasn't been solved. :( Issue:2 (rather long) sections of taxiway A and B along RWY24 have a friction problem.Although it looks like tarmac, it feels like a dirt strip (actually you also see dirt jumping off the wheels when taxiing over it)This friction bug causes you have to taxi at about 60% N1, which is very annoying.Question:Since I don't expect a patch in the forseable future, is this something I can fix myself?I don't have any scenery building experience, but please advise if it is possible at all.If so please also give me a hint in the proper direction how to solve it.Thanks for your help,Egbert