Best Merger Program?

I recently downloaded a few emulators and started to download some games, they are about to finish within 20mins or so and there are multiple parts to some games, such as spyro for example, i was wondering what the best program to merge the parts together would be?
Thanks alot
Answer #1
it depends,if its RAR files (compressed)
then winrar or 7-zip would be best
(do note that you need to extract from only 1 of the files
per game or whatever and not from all) if your gonna go with winrar,better find it in .zip otherwise youll have probs openning it if its hjsplit files (with a .001/.002/.003 extensions)
then youll need to get hjsplit
Answer #2
It’s depending on splitted apps. Usually Winrar or HJSplit can do this.