Applying SPs Using SAPinst

Hi!

I'm currently updating our JDI server from SP Stack 09 to 12.

I'm using "SAP Netweaver '04 SP Stack 12 Guide", and in the document, it says that I have to use SAPinst to apply the .SAR files (J2EERT, SAPINST, CTRL, J2EERTOS).

Where can I find this SAPinst tool? Is this the startinstgui.bat in the Master DVD of NetWeaver '04? I keep on getting an error when I enter the hostname and port no.

Please help.

Regard,

Erik