Hi, welcome to LQ and the wonderful world of Linux :}
If re-partitioning is not an option you can create a swap
file (which has a little performance penalty compared to
a partition). If you haven't done too much work on the
machine yet I'd highly recommend to re-install and repartition.
dd if=/dev/zero of=swap.img bs=1024 count=600000
swapon -v swap.img