Parental Control PIN timeout

[droopie]

This may be mentioned on the forum somewhere, but I haven't found the correct combination of keywords.

I have parental controls on and set to block anything PG13 or higher. Last night I was watching CSI marathon on SyFy. I have to enter my pin to watch. I flip to ESPN to watch Peyton Manning throw int after int (no wonder they been running so much)...but when I hit return to previous channel, even if it was only 10 seconds, I have to enter my pin again. Is there any way to change that...a registry setting or something that says the pin is active for mins, 20 mins, etc?

Staying on this...if there's not, will the tv hooked to a Xbox360 work with its parental controls enabled? If so, once Xmas gifts are opened and kids get new tvs, I could turn off WMC parental controls and just use the tv v chip.