how to burn a cd a low speed

view full story

http://askubuntu.com – i am trying to burn iso image of lubuntu 11.10-alternate (i had tried active iso and free iso burner). the problem is that the burning of cd should take place at low speed (i.e. 4x or low stated here in second last topic) but as soon as i put the cd (which is 52x speed) the option of 4x and lower disappears . I have tried to find less than 52x speed cd but havent got one yet. Now is there any trick or a software so that i could write iso image at 4x or lower speed . i have tried writting iso image at higher speeds but the iso file gets corrupted (knew because checked the integrity of it right (HowTos)