[Ltib] how to alter a patch file...

[R.J.Sivakumar]

Dear support,
                 Iam trying to modify a driver file which was in patch format, 
as it said in LtibFAQ in section  "How do I make changes to a package and 
capture them",used the command 
 # ./ltib -m prep -p linux-2.6.16-mx31-mxc_ipu.patch
which gives the error
Don't have HTTP::Request::Common
Don't have LWP::UserAgent
Cannot test proxies, or remote file availability without both
HTTP::Request::Common and LWP::UserAgent

get_spec: can't find spec file linux-2.6.16-mx31-mxc_ipu.patch.spec

in search any of the directories:
    /home/skumar/freescale/ltib-imx31ads-20060709/rpm/SPECS
    /home/skumar/freescale/ltib-imx31ads-20060709/config/platform/imx31ads
    /home/skumar/freescale/ltib-imx31ads-20060709/dist/lfs-5.1


Processing platform: Freescale IMX31 ADS reference board
==========================================================
using config/platform/imx31ads/.config

Processing: linux-2.6.16-mx31-mxc_ipu.patch
=============================================
skipping linux-2.6.16-mx31-mxc_ipu.patch, specfile not found


f_prep() returned an error, exiting
Exiting on error or interrupt

Please suggest me to overcome this..
Thanks in advance
-- 
Best regards,
Sivakumar.R.J