OS upgrade

Hello, fellows:

I have an old H80 with AIX 4.3, I want to upgrade to AIX 5.3, is this possible?

I have read in some documentation that is necesary do it version to version, I mean... 4.3->5.1 5.1->5.2 5.2->5.3, anybody have this experience?

I will aprecciate yor help.

Kind regards.

These sites might help. Both talk about upgrading.

http://www.redbooks.ibm.com/redbooks/pdfs/sg246924.pdf

http://publib.boulder.ibm.com/infocenter/pseries/topic/com.ibm.aix.resources/RELNOTES/53\_base_relnotes.pdf

Thanks for your help chap.

Kind regards!!!