I have downloaded the sources and found the section you are talking about, which is now:

	mov r0,#026h          ; bytes to copy 26h-1
	;mov r1,#026h          ; lower byte of destination address
	mov dptr,#monstart     ; DPTR points into my Flash
copyirqs:
	mov A,r0              	; load offset into my original table
	movc A,@A+dptr        	; get byte from code space
	
	mov P2,#HIGH(resetvector)		; set upper byte of reset vector to the XRAM bus
	movx @r0,A            	; lower byte on bus = offset - write the byte from CODE space there
	dec r0   	      	; decrement destination pointer
	djnz r0,copyirqs    	; loop for all bytes in charge

You decrement r0 twice per loop, thus copying only the even address bytes (each other). Also, you won't copy byte at address 0, is this OK?

You might want to use some sort of '51 simulator to check your code snippets...

Jan Waclawek

PS. Code memory optimisation hint: in the SFR read/write, don't jump into a jump table, jump immediately into the doce (array of mov A,SFR; ret) - you can spare down the jumptable.