HDL(HD Loader):

The APPINFO.PBT file should have the following script exactly:

# BootManager 2 Application Manager Script for HDLoader

# Change this information to describe the application.
SET "TITLE" "HDLoader"
SET "VERSION" "0.8b"
SET "AUTHOR" "Sjeep"
SET "DESC" "HDloader allows you to run full games from any internal hard drive."
SET "MEDIAS" ""
#

IF NOT EXISTS "$PWD$/HDLOADER.ELF"
RETURN "-1"
ENDIF

# Do not change these 2 lines!
GOTO "$ARG1$"
RETURN "-1"

:LABEL_NAME
ADDWIDGET "LABEL" "$ARG2$$TITLE$ v$VERSION$"
EXIT "0"

:QUERY
ADDWIDGET "CALL" "$TITLE$" "$BM.TXT_VERSION$: $VERSION$ $BM.TXT_AUTHOR$: $AUTHOR$ $BM.TXT_DESC$: $DESC$" $ARG2$ "$ARG0$" "$ARG3$" "$ARG4$" "$ARG5$"
EXIT "0"

:INSTALL
IF FAIL COPY "$PWD$" "$ARG2$:/BM/APPS/HDLOADER"
MESSAGE "Failed installing $TITLE$!"
RRM "$ARG2$:/BM/APPS/HDLOADER"
RETURN -1
ENDIF
EXIT 0

:REMOVE
IF FAIL RRM "$PWD$"
MESSAGE "Failed removing $TITLE$!"
RETURN -1
ENDIF
EXIT 0

:RUN
LOADEXEC "PBAT" "$BM.SCRIPTS$/LOADEXEC.PBT" "$PWD$/HDLOADER.ELF"
EXIT "0"

PS2LINK(Networking usage):

The script should look as follows:

#
# Application Manager Script for BootManager 2
#

# Change this information to describe the application.
SET "TITLE" "PS2Link"
SET "VERSION" "1.52"
SET "AUTHOR" "PS2DEV.org"
SET "DESC" "Run applications and transfer files over network."
SET "MEDIAS" ""
#

# Do not change these 2 lines!
GOTO "$ARG1$"
RETURN "-1"

:LABEL_NAME
ADDWIDGET "LABEL" "$ARG2$$TITLE$ v$VERSION$"
EXIT "0"

:QUERY
ADDWIDGET "CALL" "$TITLE$" "$BM.TXT_VERSION$: $VERSION$ $BM.TXT_AUTHOR$: $AUTHOR$ $BM.TXT_DESC$: $DESC$" $ARG2$ "$ARG0$" "$ARG3$" "$ARG4$" "$ARG5$"
EXIT "0"

:INSTALL
IF FAIL COPY "$PWD$" "$ARG2$:/BM/APPS/PS2LINK"
MESSAGE "Failed installing $TITLE$!"
RRM "$ARG2$:/BM/APPS/PS2LINK"
RETURN -1
ENDIF
EXIT 0

:REMOVE
IF FAIL RRM "$PWD$"
MESSAGE "Failed removing $TITLE$!"
RETURN -1
ENDIF
EXIT 0

:RUN
REDIRFILE "$PWD$/IPCONFIG.DAT" "$BM.BM_PATH$/CONFIG/IPCONFIG.DAT"
LOADEXEC "PBAT" "$BM.SCRIPTS$/LOADEXEC.PBT" "$PWD$/PS2LINK.ELF"
EXIT "0"

HDLSVR(HD Loader usage for hdl_dump):

The script should look as follows here:

# BootManager 2 Application Manager Script for HDLoader

# Change this information to describe the application.
SET "TITLE" "HDLD_SVR"
SET "VERSION" "0.8.5"
SET "AUTHOR" "W1zard 0f 0z/Bobi B."
SET "DESC" "HDLD_SVR is the PS2 part of hdl_dump to upload, erase, download games to and from your HDD."
SET "MEDIAS" ""
#

IF NOT EXISTS "$PWD$/HDLD_SVR.ELF"
RETURN "-1"
ENDIF

# Do not change these 2 lines!
GOTO "$ARG1$"
RETURN "-1"

:LABEL_NAME
ADDWIDGET "LABEL" "$ARG2$$TITLE$ v$VERSION$"
EXIT "0"

:QUERY
ADDWIDGET "CALL" "$TITLE$" "$BM.TXT_VERSION$: $VERSION$ $BM.TXT_AUTHOR$: $AUTHOR$ $BM.TXT_DESC$: $DESC$" $ARG2$ "$ARG0$" "$ARG3$" "$ARG4$" "$ARG5$"
EXIT "0"

:INSTALL
IF FAIL COPY "$PWD$" "$ARG2$:/BM/APPS/HDLD_SVR"
MESSAGE "Failed installing $TITLE$!"
RRM "$ARG2$:/BM/APPS/HDLD_SVR"
RETURN -1
ENDIF
EXIT 0

:REMOVE
IF FAIL RRM "$PWD$"
MESSAGE "Failed removing $TITLE$!"
RETURN -1
ENDIF
EXIT 0

:RUN
SHUTDOWN "MM"
LOADEXEC "PBAT" "$BM.SCRIPTS$/LOADEXEC.PBT" "$PWD$/HDLD_SVR.ELF"
EXIT "0"