well as regard to r4 pro gold firmware
download fwupdate_for_WOOD_R4dsi here is the link
http://www.r4ill-net.com/r4-pro_downloads/...D_R4dsi1.21.rar
extract the files and copy to your memory card
load flashcart into slot 1 and turn on ds
in your ds lite go to the file fw_update.nds and press A
press Y for yes and the screen will display "firmware updated cycle power"
restart the ds lite
now download Update for 1.41 of DSi here is the link
http://www.r4ill-net.com/r4-pro_downloads/...ate_141_DSi.rar
extract the files and copy r4ifw_update_141_DSi.nds to your memory card (dont delete the old files)
put the flashcart in slot 1 and turn on the ds lite
within your ds navigate to the file r4ifw_update_141_DSi.nds and press A
Ds lite will ask confirmation and will take some time to update
once done you can copy nds games and movies (dpg format) either directly to memory card or make folders "Games" and "Movies" on your memory card and copy in those folders
play games and movies after navigating to the files in ds lite
hope this helps (worked in my case)
regards