Regex Lesson needed

[JMichaelTX]

@kcwhat

I rarely ask for help and performed a few hours of due diligence and searches. Don't embarrass me too much please.

No problem, but I am going to embarrass you.
I think you know that you should always post BOTH the source string and the resultant string using a forum Code Block, so that all non-printing characters are properly retained.

Here's my suggestion:

@kcwhat

the first space after, CHGO1249987 , to a "-" (dash).

SEARCH FOR:
(.+?)\h+(.+)

REPLACE WITH:
\1 - \2

See: (.+?)\h+(.+)

@kcwhat

change the first O (in CHGO1249987) to 0

This is very easy.

SEARCH FOR:
(CHG)O

REPLACE WITH:
\10

I put "CHGO" in parenthesis to make it a Capture Group, so that I could just reference it in the Replace, rather than retype it, and maybe make a typo.

Glad to see you're learning RegEx. It is very powerful, and once you get over the initial hump, you will find uses for it every day. BBEdit is a great tool to massage text.