I was wonder, is it really complicated to also make quickbms do the pack part? Since you are able to unpack most of the archives, than it would make sence to me also make a possible to pack the archive back. I know we have re-import function and so on, but it is not same becasue you are limited filesize of replacing file. It is just an idea. But let me tell you 1 thing, if you would accomplish this and it would be working, than quickbms would become the best, most handy tool ever and ppl would not need anything else.
This is just my input
Regards