Launch/quit apps at specific times

I have a Mac 7500/G3 running OS9. It holds and runs my Surfdoubler internet sharing software for my network. I want to automatically start up Surfdoubler at 4 p.m. and then automatically quit the application at midnight. Then, I want to start it up at 6 a.m. then then stop at 9 a.m.
I’m brand new to Applescript, and I’ve created a script that launches Surfdoubler. I haven’t quit figured out how to create a script that quits Surfdoubler.
My big question is: How do I set it up so that my scripts start and stop Surfdoubler at certain times of day? Is there an application out there that does this without creating scripts? Any suggestions?

: I have a Mac 7500/G3 running OS9. It holds and runs my Surfdoubler internet
: sharing software for my network. I want to automatically start up
: Surfdoubler at 4 p.m. and then automatically quit the application at
: midnight. Then, I want to start it up at 6 a.m. then then stop at 9 a.m.
: I’m brand new to Applescript, and I’ve created a script that launches
: Surfdoubler. I haven’t quit figured out how to create a script that quits
: Surfdoubler.
: My big question is: How do I set it up so that my scripts start and stop
: Surfdoubler at certain times of day? Is there an application out there
: that does this without creating scripts? Any suggestions?
To launch scripts on a schedule, you can find info on our Scripting Tools
page:
iDo Script Scheduler
T-Minus Ten
There’s also an AppleScript based application which runs scripts on a
schedule. For more info, and to download, go to:
Script Timer
I’ve never used iDo or Script Timer but T-Minus Ten serves my needs
faithfully every day. It also does more than just launch scripts. There
are probably alternatives, but these will give you something to consider.
Later,
Rob J

Depending on whether you wish to know the time the computer has idled, or whether you wish to schedule a script at times of day or following certain events or repeatedly try:

Acron http://wrcu.coLgate.edu/sean/Acron/index.html
Akua Sweets http://osaxen.com/index.php3?id=akua_sweets
Cron http://gargravarr.cc.utexas.edu/cron/index.html
Cruise Control http://www.walnutsys.com/
DaemonCron Lite 1.5 http://homepage.mac.com/dcoshel/daemon.html
idle time osax http://osaxen.com/index.php3?id=idle_time
idle time extension http://www.dijas.com/ely-old/files-scripting.html
iDo Script Scheduler http://www.sophisticated.com/software/
Keyquencer http://www.binarysoft.com/kqmac/kqmac.html
MacAT http://gimr.garvan.unsw.edu.au/gerham/macsos/macat/index.html
PowerTask http://www.compsoftspec.com/powertask.html
QuicKeys http://www.quickeys.com/
Scheduler http://hotyellow98.com/jvarela/
Script Scheduler http://www.wmotion.com/products.html
Script Timer http://www.theboss.net/appsmore/
Sleep Commands http://home.earthlink.net/~eagrant/
T-Minus Ten http://home.austin.rr.com/mk/tmt/tmt.html

You may already own iDo, as it came free with OS8 thru 8.6, I think.