No, not with this. But you can do it with one of the following
1. Buy 3rd party SEO module like CDSEO OR
2. Use this free mod -
http://www.cflsystems.com/custom-page-titles-mod-for-x-cart-shopping-cart.html OR
3. Upgrade to 4.3.2 where the above #2 is already build in
BTW I would recommend you to upgrade to at least 4.2.3 - 4.2.0 was buggy