It works great for me, and is kind of cool.
RegScan results for users in #si
Total: 17 - Invisible: 0 - Registered: 12 - UnRegistered: 5
Registered Nicks: [SI]Raid, |SI|SPKTrini, DiNaleKnight, |HM|Halos, |SI|Zombieduelist, Reyz, |SI|Savage_Wolf, [SI]Guts, DarthVader, jAYjAY, Invisible, {GOL}Sp0rkeh
Unregsistered Nicks: |H||SI|br3ak3r, Immortality, |SI|B[a]tt, |SI|Xtry, Lord|SignOff

I\'m being lazy so I added this to the top of the script. On the second just type the channel twice.
Menu Channel {
Registered Scanner
.Scan active and echo:/regscan
.Scan a channel msg that channel:/regscan $?=\"Scan channel\" $?=\"Channel\"
}