First, thank you for respecting copyright. You are a rare and beautiful unicorn. If you want to use a cold comfort knits pattern for reasons other than personal use, I'm happy to help with that. I usually respond to e-mails within 24 hours.
If I catch you stealing my work, me and my flock will hunt you down and poke your eyes out with our knitting needles.
I'm happy to provide pattern support for issues specific to cold comfort knits patterns--as written. I want your project to be a success! If you're stuck on a particular instruction, or something doesn't quite make sense, shoot me an e-mail. I usually respond within 24 hours.
Unfortunately, "Will yarn X work with pattern Y" is not a question I can answer. Hard as it is to believe, I am not personally familiar with the thousands of yarns on the market today (I know, you're shocked, lol).
I'm happy to offer guidance on general aspects of yarn substitution--weight, fibre content etc., but anything more than that would be a guess, not a guarantee.
On the off chance that you actually enjoy empty promises and risky knitting, I can falsely reassure you, but you'll have to sign a waiver.
I do not offer specific guidance on re-sizing. The available sizes are included in the pattern description. Please read carefully before purchasing.
I have nothing funny to say about this because e-mail requests asking me to re-write a pattern in another size make me want to poke my own eyes out with my knitting needles.