How to merge 2 .rar files into one ?

Hi!
Does anybody know how to merge 2 .rar files into one ?
I know it is possible and have done it before but it was long time ago and now i forgot how to do this.
I mean something like this:
Before:
Files – 200 mb
Part 1 – 50 mb
Part 2 – 50 mb
Part 3 – 50 mb
Part 4 – 50 mb
After:
Part 1 – 50 mb
Part 2 – 50 mb
Part 3 – 100 mb
I think you could merge them with winrar and you do it after packing the file to 4 parts.
Thanks in advance
Answer #1
1. How to use Google?
http://www.ehow.com/how_5103732_merge-rar-files.html
Answer #2
wo_Ot? replied: 1. How to use Google?
http://www.ehow.com/how_5103732_merge-rar-files.html
2. How to not help and not write stupid posts?
First it’s not what i was looking for.
Second i was googling after it yesterday and haven’t found anything.
Answer #3
extract two parts and make a new archive lol ?
Answer #4
Ste#. replied: extract two parts and make a new archive lol ?
How do you extract only 2 from all of 4 parts ?
If i just choose 2 last parts and add it to archive then it gives me an error, i know that when i did it last time the extracing went just fine without errors and i didn’t have to extract it two times to get it extracted properly.