About the code location

I have a project for AT89c2051, which only include one file named main.c. the following is the content of main.c:

sfr P1 = 0x90;

void main()
{ P1 = 0x0a5; while(1);
}

in the dialog of "Options for Target '...'"(target sheet) i setup as follows: Memory Model: Small: Variables in DATA

Code Rom Size: Small: Program 2k or less
and the others item are default(blank).

My link out file is as follows(main.m51),

BL51 BANKED LINKER/LOCATER V6.15
02/11/2009 23:24:55 PAGE 1

BL51 BANKED LINKER/LOCATER V6.15, INVOKED BY:
E:\KEIL\C51\BIN\BL51.EXE main.obj TO thk_display IXREF

MEMORY MODEL: SMALL

INPUT MODULES INCLUDED: main.obj (MAIN) E:\KEIL\C51\LIB\C51S.LIB (?C_STARTUP)

LINK MAP OF MODULE: thk_display (MAIN)

TYPE BASE LENGTH RELOCATION SEGMENT NAME
-----------------------------------------------------

* * * * * * * D A T A M E M O R Y * * * * * * *
REG 0000H 0008H ABSOLUTE "REG BANK 0"
IDATA 0008H 0001H UNIT ?STACK

* * * * * * * C O D E M E M O R Y * * * * * * *
CODE 0000H 0003H ABSOLUTE 0003H 07FDH *** GAP ***
CODE 0800H 000CH UNIT ?C_C51STARTUP
CODE 080CH 0005H INBLOCK ?PR?MAIN?MAIN
...

*******************************************************
Program Size: data=9.0 xdata=0 code=20
LINK/LOCATE RUN COMPLETE. 0 WARNING(S), 0 ERROR(S)

My questions:
1. How can i put models(C_C51STARTUP and ?PR?MAIN?MAIN) in 0x0100--0x07ff? For AT89c2051's rom only exists in this range.

2. The model of ?C_C51STARTUP came from where? Can it is need? If is not need how can i remove it?

3. I think keil is difficult to used than other tools such as IAR. It is realy?

my email is hbzou@iipc.zju.edu.cn
Thanks!