A few suggestions:
* Be upfront in your cover letter about your desire to transition into Tech Svcs, but also specify WHY you want to make that move -- it's a relatively unusual transition, and I know that if I saw that in a search, I'd be curious. Your reasons, if well articulated, might be my deciding factor in your favor for an entry-level position.
* Take some cataloging classes or workshops. I don't know where in NY you are, but NYLINK offers good classes throughout the year across the state. You'll learn interesting things, and you'll also be able to show through your CV that you're proactively building your skill set in technical services tasks. (the full NYLINK education website is here:
http://www.nylink.org/education/ed_subj.cfm)
