Hi, I'm trying to do a rename where I want to, for example rename these types of files in a for loop. I've done it before but I can't seem to remember the code I used: file format is something like this where ## denotes numbers [ab-c] abc abc abc! - ## [abc].xxx I want to rename them to abc abc abc! ## [ab-c].xxx I tried a for-loop like this for %x in ("^[*^]*[a-zA-Z\! ]??*[0-9]*.xxx") do ren %x "%2 %5^[%1^].xxx" and another like for %x in ("^[*^] *^[*^].xxx) do ren %x "%2^[%1^].xxx" It usually just doesn't work, but once I replaced the name of a file with %2[%1].xxx!! I know I'm obviously doing something wrong, but I don't think I understand exactly how this rename thing works with regular expressions. I've also seen a lot of %%x but dos just tells me it doesn't recognize %%x when I enter it... what does that mean and how do I make this work? Thanks!