Hi
I expect your Dell has a recovery partition and a Windows recovery DVD disk builder
There seems to be two options:-
if you can build a set of recovery DVD Windows disks
disconnect hard disk, install SSD and use recovery disk to install Windows 7 on SSD. (you loose user programs & account data)
or if SSD has enough capacity
get hold of disk cloning software from Samsung and clone boot manager partition, recovery partition and C: onto SSD
once this is up and running you can re connect old hard disk
many hard disk & SSD manufacturers supply a oem copy of disk cloning/duplicating/formating software from Acronis.
This will work if old or new disk is supported.
I used a 120GB SSD to replace 80GB 10k rpm WD hard disk so did not have problem of new disk being smaller than old hard disk
regards
Mike Barnes