bootloading ATMEGA168A-PU using OptiLoader

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i bootloaded atmega168a-pu , atmega8l-8pu using westfw's  optiloader
what difference between a-pu , p-pu??????
also meaning of 8pu????i read somewhere meant max frequency 8mhz

i programmed bootloader on empty chips using arduino uno r2

i used exact circuit given here both chips

i did not find errors while burning bootloader
no errors seen on serial monitor

also when powerup chips on breadboard led on pin 13 blinks everytime press reset.
does mean bootloader fine??

i asking because building own arduino serial (for school project) used atmega168 , not able upload sketches! here link http://arduino.cc/forum/index.php/topic,103229.0.html

any essential

which bootloader did burn?


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