combine "Save As" with suffix for file's name

I have 600x600px file named "ABC". I want to save this file in three versions within 1 folder which different to original folder:

ver1   600x600px   name  ABC_1  in JPEG

ver2   300x300px   name  ABC_2  in PSD

ver 3  300x300px   name ABC_3   in JPEG.

I can do this with Save As command but cannot add suffix.  I can add suffix with a script but I dont know how to create a UI interface to choose file type and file address like we do with Save As . Thanks in advanced for your script's  help .