1. Open your shopping.dat with notepad (it's in data folder, you can copy it to a folder inside modloader, make sure to have only 1 shopping.dat inside modloader).

2. Find the CarMods section (usually it's the first one). It looks like this:

	section CarMods
		#name,			nametag,	stats to change,		price   
		<lots of tuning parts data here>
	end						

3. Add these lines in the section (anywhere between "section CarMods" and the first "end" after it):

		exh_vigerovl_a		VIG2EXA		respect 0 	sexy 0		550
		exh_vigerovl_b		VIG2EXB		respect 0 	sexy 0		650
		fbmp_vigerovl_a		VIG2FBA		respect 0 	sexy 0		1050
		fbmp_vigerovl_b		VIG2FBB		respect 0 	sexy 0		1450
		misc_a_vigerovl_a	VIG2MAA		respect 0 	sexy 0		250
		misc_b_vigerovl_a	VIG2MBA		respect 0 	sexy 0		150
		misc_b_vigerovl_b	VIG2MBB		respect 0 	sexy 0		450
		rbmp_vigerovl_a		VIG2RBA		respect 0 	sexy 0		1050
		rbmp_vigerovl_b		VIG2RBB		respect 0 	sexy 0		1450
		rf_vigerovl_a		VIG2RFA		respect 0 	sexy 0		350
		spl_vigerovl_a		VIG2SPA		respect 0 	sexy 0		550
		spl_vigerovl_b		VIG2SPB		respect 0 	sexy 0		850
		spl_vigerovl_c		VIG2SPC		respect 0 	sexy 0		950
		wg_l_vigerovl_a		VIG2WGA		respect 0 	sexy 0		550
		wg_l_vigerovl_b		VIG2WGB		respect 0 	sexy 0		650
		
4. Find the carmod1 section (it's TransFender section). Usually it looks like this:

section carmod1 # Normal Cars
	type CarMods
		<lots of tuning items data here>
	end
	
5. Add these lines in the section (anywhere between "type CarMods" and the first "end" after it):

		item exh_vigerovl_a
		item exh_vigerovl_b
		item rf_vigerovl_a
		item misc_a_vigerovl_a
		item misc_b_vigerovl_a
		item misc_b_vigerovl_b
		item wg_l_vigerovl_a
		item wg_l_vigerovl_b
		item fbmp_vigerovl_a
		item fbmp_vigerovl_b
		item rbmp_vigerovl_a
		item rbmp_vigerovl_b
		item spl_vigerovl_a
		item spl_vigerovl_b
		item spl_vigerovl_c
		
6. Save the changes and close the file.