[Silent Watcher]

how do i change the data1.hdr file contained within the gta3 install cd? i was able to edit the dat1.cab file with i6comp but im afraid im not experienced enough to know every aspect of what im doing, im still in the learning stages... any suggestions or advice about how to change the file so that it will install? im not interested in the no-cd crack. my hard drive isnt that big so i prefer to just install the game. yes im lazy, i cant be bothered with changing the gta3.exe file with the fixed version, i want the cd to do it for me on install.

help would be much appreciated...