Alpha channel with two files

[thetranslator]

Hello. I have a procedure which i currently do with photoshop, which unfortunately takes a lot of memory. So I need to "transfer" it to imagemagick, through dos commands or vb. Here is what I do.

1) open 2 tga files
2) enable the alpha channel on the first one
3) add the alpha channel on the second one
4) mark all on 1st file and copy-paste to the 2nd file
5) enable the alpha channel on the 2nd file

Can you please suggest code for doing this?

Thanks