2002 Tundra keyless entry question

I recently bought a 2002 Tundra SR5 access cab 4WD with a keyless entry. I have a manual for the truck, but it has no information on the keyless entry system. I am unable to enter the truck using the regular key as the alarm always goes off and then the only way to turn the alarm off is with the keyless key. Since I only have one keyless key pad is there any way to deactivate the alarm? A friend recently bought a 2004 model. On his truck if the door is locked with the regular key it can be opened with the regular key without the alarm going off, this is something I would like to be able to do. In addition my key pad has only 2 buttons, one of which locks or unlocks the doors, the other seems to do nothing (does it have a function?). Is there any way to enter or lock the truck without the anoying beep of the horn if desired? Anybody have any information or can have any idea where to go for information? Bill snipped-for-privacy@worldnet.att.net